US2376033A - Keto esters - Google Patents
Keto esters Download PDFInfo
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- US2376033A US2376033A US442183A US44218342A US2376033A US 2376033 A US2376033 A US 2376033A US 442183 A US442183 A US 442183A US 44218342 A US44218342 A US 44218342A US 2376033 A US2376033 A US 2376033A
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- alpha
- methyl
- ketone
- solution
- acrylic
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- 125000000468 ketone group Chemical group 0.000 title description 2
- -1 alpha acetyl ethyl Chemical group 0.000 description 34
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 16
- 229930194542 Keto Natural products 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 229910052783 alkali metal Inorganic materials 0.000 description 9
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010992 reflux Methods 0.000 description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 150000002576 ketones Chemical class 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000012044 organic layer Substances 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 125000005283 haloketone group Chemical group 0.000 description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 150000002367 halogens Chemical group 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- OJVAMHKKJGICOG-UHFFFAOYSA-N 2,5-hexanedione Chemical compound CC(=O)CCC(C)=O OJVAMHKKJGICOG-UHFFFAOYSA-N 0.000 description 2
- ONPJWQSDZCGSQM-UHFFFAOYSA-N 2-phenylprop-2-enoic acid Chemical compound OC(=O)C(=C)C1=CC=CC=C1 ONPJWQSDZCGSQM-UHFFFAOYSA-N 0.000 description 2
- SYBYTAAJFKOIEJ-UHFFFAOYSA-N 3-Methylbutan-2-one Chemical compound CC(C)C(C)=O SYBYTAAJFKOIEJ-UHFFFAOYSA-N 0.000 description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N 4-penten-2-one Chemical compound CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 2
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 150000001253 acrylic acids Chemical class 0.000 description 2
- FUSUHKVFWTUUBE-UHFFFAOYSA-N buten-2-one Chemical compound CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- BULLHNJGPPOUOX-UHFFFAOYSA-N chloroacetone Chemical compound CC(=O)CCl BULLHNJGPPOUOX-UHFFFAOYSA-N 0.000 description 2
- 210000002196 fr. b Anatomy 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- LABTWGUMFABVFG-UHFFFAOYSA-N methyl propenyl ketone Chemical compound CC=CC(C)=O LABTWGUMFABVFG-UHFFFAOYSA-N 0.000 description 2
- PJGSXYOJTGTZAV-UHFFFAOYSA-N pinacolone Chemical compound CC(=O)C(C)(C)C PJGSXYOJTGTZAV-UHFFFAOYSA-N 0.000 description 2
- SONHXMAHPHADTF-UHFFFAOYSA-M sodium;2-methylprop-2-enoate Chemical compound [Na+].CC(=C)C([O-])=O SONHXMAHPHADTF-UHFFFAOYSA-M 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BBDIGFRPESASEK-UHFFFAOYSA-N (2-oxocyclohexyl) 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1=O BBDIGFRPESASEK-UHFFFAOYSA-N 0.000 description 1
- SWGLACWOVFCDQS-VNKDHWASSA-N (3e,5e)-hepta-3,5-dien-2-one Chemical compound C\C=C\C=C\C(C)=O SWGLACWOVFCDQS-VNKDHWASSA-N 0.000 description 1
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- OTKCEEWUXHVZQI-UHFFFAOYSA-N 1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(=O)CC1=CC=CC=C1 OTKCEEWUXHVZQI-UHFFFAOYSA-N 0.000 description 1
- OZXIZRZFGJZWBF-UHFFFAOYSA-N 1,3,5-trimethyl-2-(2,4,6-trimethylphenoxy)benzene Chemical compound CC1=CC(C)=CC(C)=C1OC1=C(C)C=C(C)C=C1C OZXIZRZFGJZWBF-UHFFFAOYSA-N 0.000 description 1
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- XRLQPWQYUOVNTR-UHFFFAOYSA-N 1-cyclohexyl-2-methylpropan-1-one Chemical compound CC(C)C(=O)C1CCCCC1 XRLQPWQYUOVNTR-UHFFFAOYSA-N 0.000 description 1
- RIFKADJTWUGDOV-UHFFFAOYSA-N 1-cyclohexylethanone Chemical compound CC(=O)C1CCCCC1 RIFKADJTWUGDOV-UHFFFAOYSA-N 0.000 description 1
- CVBUKMMMRLOKQR-UHFFFAOYSA-N 1-phenylbutane-1,3-dione Chemical compound CC(=O)CC(=O)C1=CC=CC=C1 CVBUKMMMRLOKQR-UHFFFAOYSA-N 0.000 description 1
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical compound CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 1
- CCHNWURRBFGQCD-UHFFFAOYSA-N 2-chlorocyclohexan-1-one Chemical compound ClC1CCCCC1=O CCHNWURRBFGQCD-UHFFFAOYSA-N 0.000 description 1
- RNDVGJZUHCKENF-UHFFFAOYSA-N 5-hexen-2-one Chemical compound CC(=O)CCC=C RNDVGJZUHCKENF-UHFFFAOYSA-N 0.000 description 1
- VPDNTRHVNHBJCM-UHFFFAOYSA-N 79482-06-7 Chemical compound C1CC2=CC=C3C(=O)C(Cl)(Cl)C(=O)C4=CC=C1C2=C43 VPDNTRHVNHBJCM-UHFFFAOYSA-N 0.000 description 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 1
- BWHOZHOGCMHOBV-UHFFFAOYSA-N Benzalacetone Natural products CC(=O)C=CC1=CC=CC=C1 BWHOZHOGCMHOBV-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 1
- 241000723346 Cinnamomum camphora Species 0.000 description 1
- QSJXEFYPDANLFS-UHFFFAOYSA-N Diacetyl Chemical group CC(=O)C(C)=O QSJXEFYPDANLFS-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- BAPJBEWLBFYGME-UHFFFAOYSA-N acrylic acid methyl ester Natural products COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229960000846 camphor Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 235000013985 cinnamic acid Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 150000003997 cyclic ketones Chemical class 0.000 description 1
- NZZIMKJIVMHWJC-UHFFFAOYSA-N dibenzoylmethane Chemical compound C=1C=CC=CC=1C(=O)CC(=O)C1=CC=CC=C1 NZZIMKJIVMHWJC-UHFFFAOYSA-N 0.000 description 1
- RDULEYWUGKOCMR-UHFFFAOYSA-N ethyl 2-chloro-3-oxobutanoate Chemical compound CCOC(=O)C(Cl)C(C)=O RDULEYWUGKOCMR-UHFFFAOYSA-N 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 1
- ILPNRWUGFSPGAA-UHFFFAOYSA-N heptane-2,4-dione Chemical compound CCCC(=O)CC(C)=O ILPNRWUGFSPGAA-UHFFFAOYSA-N 0.000 description 1
- OWPLIXQRZLGTEA-UHFFFAOYSA-N hexane-2,3-dione;hexane-2,5-dione Chemical compound CCCC(=O)C(C)=O.CC(=O)CCC(C)=O OWPLIXQRZLGTEA-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- SHOJXDKTYKFBRD-UHFFFAOYSA-N mesityl oxide Natural products CC(C)=CC(C)=O SHOJXDKTYKFBRD-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- HEBFNODWSUVRBB-UHFFFAOYSA-M sodium;2-methylprop-2-enoate;2-methylprop-2-enoic acid Chemical compound [Na+].CC(=C)C(O)=O.CC(=C)C([O-])=O HEBFNODWSUVRBB-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- BWHOZHOGCMHOBV-BQYQJAHWSA-N trans-benzylideneacetone Chemical compound CC(=O)\C=C\C1=CC=CC=C1 BWHOZHOGCMHOBV-BQYQJAHWSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
Definitions
- This invention relates to a novel method of producing keto esters of acrylic acids.
- esters of this invention are prepared by reacting a metal salt of the acrylic acid with a halogen substituted ketone thereby splitting out a metal halide.
- the reaction is illustrated by 4 the following equation:
- esters of acids of the acrylic series in which the carbonyl group is beta to the carboiwl group are especially easy to prepare accordin -to the process of this invention.
- Compounds which may be thus prepared include alpha acetyl ethyl methacrylate, propionyl methyl methacrylate, cyclohexanonyl methacrylate, methyl cyclohexanonyl methacrylate, l-carbethoxy acetyl methacrylate, acetyl methyl methacrylate, and benzoyl methyl methacrylate.
- halogen ketones with which the salt of an acrylic acid may be reacted according to theprocess of this invention include the alpha chlor substitution products of methyl isopropyl ketone, methyl butyl ketone, methyl isobutyl ketone, methyl tertiary butyl ketone (pinacoline) methyl amyl ketone and methyl i'soamyl ketone.
- the acrylic series are the alpha halogen substitution products of cyclic ketones, such as methyl cyclohexyl ketone, isopropyl cyclohexyl ketone, camphor, acetophenone, benzyl phenyl ketone, dibenzoyl methane, benzal acetone and benzoyl acetone.
- cyclic ketones such as methyl cyclohexyl ketone, isopropyl cyclohexyl ketone, camphor, acetophenone, benzyl phenyl ketone, dibenzoyl methane, benzal acetone and benzoyl acetone.
- the acrylates which are reacted with the foregoing halogen-substituted ketones and others like them are, in general, those which form monomeric alkali metal salts.
- the alpha alkyl substituted acrylic acids yield especially useful esters.
- the sodium salt of the acrylic acid compound may be prepared by any of several different methods, one of which is by hydrolysis of an ester, for xample, the methyl ester of the acid.
- a solution of 88 grams of NaOH in 800 cc. of water was added with stirring to 200 grams (2 mols) of methyl methacrylate containing 2 After about 40 minutes. during which time the color of the mixture deepened, solution was complete, with the exception of 22 grams of polymeric ester.
- gentle heating and stirring, for 45 minute was followed by removal of the generated methyl alcohol by warming under reduced pressure.
- EXAMPLE 2 (Alpha-acetyl ethyl) methocrylate phenyl para phenylenediamine. The, mixture was refluxed gently for 2 /2 hours, solution being then .being substantially complete, following which distillation at 35 mm. pressure was con- ;ducted' until there was collected 191 grams of distillate containing the greater portion of the methanol generated. To the resulting acrylic solution 212 grams or 3-chloro butanone-2 was added over a period of 30 minutes, the mixtures being stirred and maintained at a temperature oi! 100-110 C. for a. total period of 2%, hours. The organic layer was separated, washed with saturated NaCl solution, dried and distilled. The main fraction distilled at 95-96 C. at 30 mm. and amounted to 57.5 grams. It had the following characteristics: n 1.4346, n ns" 0.986. Mol. ref. obs. 41.3, calc. 40.54.
- EXAMPLE 6 (i-carbethory aceton yl) methacrylate Condensation of sodium methacrylate (.5 mol.) with 83 grams of ethyl alpha chloro aceto acetate, was conducted in substantially the same manner as in the precedingexample-s.
- the monomeric condensation product was subjected to distillation in the presence of both hydroquinone and N,N'-diphenylp-phenylene diamine. Only a portion of the desired monomeric product distilled, collected in a fraction B. P. 60-80 at 8 mm. consisting in part of unchanged chloro ester.
- the monomer immediately polymerized and deposited as solid in the ice-cold receiver. A polymeric residue of 46 g. was nondistillable.
- EXAMPLE 7 Acetyl methyl acrylate Sodium acrylate solution was prepared by saponiflcation. of ethyl acrylate in presence of inhibitors in the same manner as in the preceding examples, the resulting alcohol being removed by distillation. To two mols of sodium acrylate solution thus prepared was added 184 g. chloro acetone, with stirring and final heating by a C. bath for period of 1.5 hours. The organic layer was separated, dried and distilled. The main traction amounting to '70 grams distilled at 99101 C. and showed 12 1.4391, 1.0615. Mol. ref. obs. 31.5, calc. 31.34.
- the method of producing a keto ester of an acrylic acid which comprises reacting an alpha chlor ketone with an alkali metal salt of the acrylic acid in solution.
- the method of producing a keto ester in which the carbonyl group is beta to the carboxyl group which comprises reacting a solution of an alpha halo ketone with an alkali metal salt of an acid selected from the group consisting of acrylic, alpha alkyl substituted acrylic, cinnamic and alpha phenyl acrylic, in .the presence of an inhibitor, at a temperature of about -reflux, until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
- the method of producing a keto ester in which the carbonyl group is beta to the car-' boxyl group which comprises reacting a solution of an alpha chloro ketone with an alkali metal salt of an acid selected from the group consisting of acrylic, alpha alkyl substituted acrylic, cinnamic and alpha phenyl acrylic, in the presence of an inhibitor, at a temperature of about reflux, until thereaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
- the method of producing a keto ester in which the carbonyl group is beta to the carboxyl group which comprises reacting a solution of an alpha chloro ketone with an alkali metal salt of an acid selected from the group consisting of acrylic, alpha alkyl substituted acrylic, cinnamic and alpha phenyl acrylic, in the presence of hydroquinone, at a temperature of between about 100 C. and about 115 C., until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the, keto ester.
- the method of producing a keto ester in which the carbonyl group is be'ta'to the carboxyl group which comprises reacting a solution of an alpha halo ketone with an alkali metal salt of acrylic acid, at a temperature of about reflux, until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
- the method of producing a keto ester in which the carbonyl group is beta to the carboxyl group which comprises reacting a solution of an alpha halo ketone with an alkali metal salt of methacrylic acid, at a temperature of about reflux, until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
- the method of producing a keto ester in which the carbonyl group is beta to the carboxyl group which comprises reacting a solution of an alpha'halo ketone with an alkali metal salt of alpha phenyl acrylic acid, at a temperature of about reflux, until the reaction ,is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Patented May 15, 1945 Albert M. Clifl'ord, Stow, Ohio, assignor to Wing foot Corporation, Akron, Ohio, a corporation of Delaware No Drawing. Application May 8, 1942,
Serial No. 442,183 1 7 Claims.
This invention relates to a novel method of producing keto esters of acrylic acids.
This application is in part a continuation of my application Serial No. 387.665, filed April 9, 1941. i
The esters of this invention are prepared by reacting a metal salt of the acrylic acid with a halogen substituted ketone thereby splitting out a metal halide. The reaction is illustrated by 4 the following equation:
The esters of acids of the acrylic series in which the carbonyl group is beta to the carboiwl group are especially easy to prepare accordin -to the process of this invention. Compounds which may be thus prepared include alpha acetyl ethyl methacrylate, propionyl methyl methacrylate, cyclohexanonyl methacrylate, methyl cyclohexanonyl methacrylate, l-carbethoxy acetyl methacrylate, acetyl methyl methacrylate, and benzoyl methyl methacrylate.
The halogen ketones with which the salt of an acrylic acid may be reacted according to theprocess of this invention include the alpha chlor substitution products of methyl isopropyl ketone, methyl butyl ketone, methyl isobutyl ketone, methyl tertiary butyl ketone (pinacoline) methyl amyl ketone and methyl i'soamyl ketone. The alpha halogen-substituted derivatives of the following unsaturated ketones may also bereacted: vinyl acetone, allyl acetone, mesityl oxide, ethylidene acetone, crotonylidene acetone (CHa-CH: ,CH-- CH=CHCOCH1) and methyl vinyl ketone; as well as the alpha halogen substitution products ofthe following di ketones: diacetyl, acetyl acetone, hexandione (acetyl propionyl methane), acetonyl acetone, and butyryl acetone. Other ketones suitable for reaction with salts of grams of hydroquinone.
the acrylic series are the alpha halogen substitution products of cyclic ketones, such as methyl cyclohexyl ketone, isopropyl cyclohexyl ketone, camphor, acetophenone, benzyl phenyl ketone, dibenzoyl methane, benzal acetone and benzoyl acetone. I V
The acrylates which are reacted with the foregoing halogen-substituted ketones and others like them are, in general, those which form monomeric alkali metal salts. The alpha alkyl substituted acrylic acids yield especially useful esters. Among suitable acids whose alkali metal salts may be used there may be mentioned acrylic acid, methacrylic acid, ethacryiic acid, itaconic. acids (CH:=COOOH nicooa where R is a hydrocarbon substituent) cinnamic acid and alpha phenyl acrylic acid.
The method of preparing the new esters is illustrated by the following examples to which, however, the invention is not limited.
Exmnn 1 Acetyl methyl methacrylate The sodium salt of the acrylic acid compound may be prepared by any of several different methods, one of which is by hydrolysis of an ester, for xample, the methyl ester of the acid. Thus, a solution of 88 grams of NaOH in 800 cc. of water was added with stirring to 200 grams (2 mols) of methyl methacrylate containing 2 After about 40 minutes. during which time the color of the mixture deepened, solution was complete, with the exception of 22 grams of polymeric ester. Gentle heating and stirring, for 45 minute was followed by removal of the generated methyl alcohol by warming under reduced pressure. The residual solution was heated under a slow reflux and, while stirring, 184 grams (2 mols) of mono chloro acetone was added during a 30-minute period. After 50 minutes additional heating, the organic layer was separated, Washed with water and dried over calcium sulfate. Then, after the addition of a further small quantity-of hydroquinone, distillation was conducted under reduced pressure. The main fraction obtained amounted to '11 grams and distilled at 102-104 C. at 35 mm. pressure. The product was a water-white liquid, a 1.4433, 1115 1.0462; mol. ref. obs. 36, calc. 35.9. Y I
. EXAMPLE 2 (Alpha-acetyl ethyl) methocrylate phenyl para phenylenediamine. The, mixture was refluxed gently for 2 /2 hours, solution being then .being substantially complete, following which distillation at 35 mm. pressure was con- ;ducted' until there was collected 191 grams of distillate containing the greater portion of the methanol generated. To the resulting acrylic solution 212 grams or 3-chloro butanone-2 was added over a period of 30 minutes, the mixtures being stirred and maintained at a temperature oi! 100-110 C. for a. total period of 2%, hours. The organic layer was separated, washed with saturated NaCl solution, dried and distilled. The main fraction distilled at 95-96 C. at 30 mm. and amounted to 57.5 grams. It had the following characteristics: n 1.4346, n ns" 0.986. Mol. ref. obs. 41.3, calc. 40.54.
Exam ne 3 Propz'onyl methyl methacrylate A sodium methacrylate solution was prepared from 2 mols of methyl methacrylate in the above manner and the resulting methanol removed.
To this solution was added 212 grams or l-chlorobutanone-2 during a period of 45 minutes while stirring. The mixture was then heated with agitation on an oil bath at a temperature of 105-115 C. The organic layer was purified by distillation and a fraction isolated with B. P.
102-5 C. at 30 mm. The product had the fOllowing characteristics: n 1.4357, dus 1.0168. Mol. ref. obs. 40.09, calc. 40.54.
EXAMPLE 4 Cycloheranony'l methacrylate One and one-fifth mols Na-methacrylate was prepared as in Example 2 above, and the methanol removed by fractionation. To this solution was added 158 g. 1.2 mols 2-chloro cyclohexanone with stirring over a 30-minute period. The mixture was then heated at a gentle reflux for two hours. After standing overnight the organic layer was separated, dried over CaSOr and distilled under reduced pressure. The main fraction boiled over a range of 45-60 C. at 5 mm. The distillate, however, polymerized very quickly, even at low temperature (5 C.). In addition to the distillate, a considerabl portion remained as a polymerized, non-distillable residue.
EXAMPLE 5 Methyl cycloheranonyl methacrylate Sodium methacrylate was condensed with X-chloro-2-methyl cyclohexanone as in Example 4. From 2.65 mols of each reactant was finally obtained a fraction B. P. 52-57 C. at '7 mm. possessing the properties: a 1.4473, 115 0.9915. Mol. ref. obs. 52.2, calc. 52.25.
EXAMPLE 6 (i-carbethory aceton yl) methacrylate Condensation of sodium methacrylate (.5 mol.) with 83 grams of ethyl alpha chloro aceto acetate, was conducted in substantially the same manner as in the precedingexample-s. The monomeric condensation product was subjected to distillation in the presence of both hydroquinone and N,N'-diphenylp-phenylene diamine. Only a portion of the desired monomeric product distilled, collected in a fraction B. P. 60-80 at 8 mm. consisting in part of unchanged chloro ester. The monomer immediately polymerized and deposited as solid in the ice-cold receiver. A polymeric residue of 46 g. was nondistillable.
EXAMPLE 7 Acetyl methyl acrylate Sodium acrylate solution was prepared by saponiflcation. of ethyl acrylate in presence of inhibitors in the same manner as in the preceding examples, the resulting alcohol being removed by distillation. To two mols of sodium acrylate solution thus prepared was added 184 g. chloro acetone, with stirring and final heating by a C. bath for period of 1.5 hours. The organic layer was separated, dried and distilled. The main traction amounting to '70 grams distilled at 99101 C. and showed 12 1.4391, 1.0615. Mol. ref. obs. 31.5, calc. 31.34.
- I claim: 5
1. The method of producing a keto ester of an acrylic acid which comprises reacting an alpha chlor ketone with an alkali metal salt of the acrylic acid in solution.
2. The method of producing a keto ester in which the carbonyl group is beta to the carboxyl group, which comprises reacting a solution of an alpha halo ketone with an alkali metal salt of an acid selected from the group consisting of acrylic, alpha alkyl substituted acrylic, cinnamic and alpha phenyl acrylic, in .the presence of an inhibitor, at a temperature of about -reflux, until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
3. The method of producing a keto ester in which the carbonyl group is beta to the car-' boxyl group, which comprises reacting a solution of an alpha chloro ketone with an alkali metal salt of an acid selected from the group consisting of acrylic, alpha alkyl substituted acrylic, cinnamic and alpha phenyl acrylic, in the presence of an inhibitor, at a temperature of about reflux, until thereaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
4. The method of producing a keto ester in which the carbonyl group is beta to the carboxyl group, which comprises reacting a solution of an alpha chloro ketone with an alkali metal salt of an acid selected from the group consisting of acrylic, alpha alkyl substituted acrylic, cinnamic and alpha phenyl acrylic, in the presence of hydroquinone, at a temperature of between about 100 C. and about 115 C., until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the, keto ester.
5. The method of producing a keto ester in which the carbonyl group is be'ta'to the carboxyl group, which comprises reacting a solution of an alpha halo ketone with an alkali metal salt of acrylic acid, at a temperature of about reflux, until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
6. The method of producing a keto ester in which the carbonyl group is beta to the carboxyl group, which comprises reacting a solution of an alpha halo ketone with an alkali metal salt of methacrylic acid, at a temperature of about reflux, until the reaction is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
7. The method of producing a keto ester in which the carbonyl group is beta to the carboxyl group which comprises reacting a solution of an alpha'halo ketone with an alkali metal salt of alpha phenyl acrylic acid, at a temperature of about reflux, until the reaction ,is substantially complete, distilling the reaction mixture at a reduced pressure and recovering the keto ester.
ALBERT M. CLIFFORD.
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4720572A (en) * | 1984-11-30 | 1988-01-19 | Bayer Aktiengesellschaft | Process for the preparation of 4-acyloxy-3-oxo-butyric acid esters |
US20030032736A1 (en) * | 2000-01-11 | 2003-02-13 | Kneafsey Brendan J. | Acrylic adhesive compositions containing ketonyl (meth)acrylate |
WO2010143553A1 (en) | 2009-06-08 | 2010-12-16 | 日東化成株式会社 | Antifouling coating composition, antifouling coating film formed from the composition, coated object having the coating film on surface, and method of antifouling treatment by forming the coating film |
CN102766048A (en) * | 2012-07-20 | 2012-11-07 | 广州市博兴化工科技有限公司 | (Methyl) acrylate compound containing ketone carbonyl group as well as preparation method and application thereof |
WO2013163889A1 (en) * | 2012-05-03 | 2013-11-07 | Dsm Ip Assets B.V. | New intermediate compound for preparing vitamin b6 |
CN102300887B (en) * | 2009-01-30 | 2014-09-03 | 爱克发印艺公司 | A new alkali soluble resin |
-
1942
- 1942-05-08 US US442183A patent/US2376033A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4720572A (en) * | 1984-11-30 | 1988-01-19 | Bayer Aktiengesellschaft | Process for the preparation of 4-acyloxy-3-oxo-butyric acid esters |
US20030032736A1 (en) * | 2000-01-11 | 2003-02-13 | Kneafsey Brendan J. | Acrylic adhesive compositions containing ketonyl (meth)acrylate |
CN102300887B (en) * | 2009-01-30 | 2014-09-03 | 爱克发印艺公司 | A new alkali soluble resin |
WO2010143553A1 (en) | 2009-06-08 | 2010-12-16 | 日東化成株式会社 | Antifouling coating composition, antifouling coating film formed from the composition, coated object having the coating film on surface, and method of antifouling treatment by forming the coating film |
WO2013163889A1 (en) * | 2012-05-03 | 2013-11-07 | Dsm Ip Assets B.V. | New intermediate compound for preparing vitamin b6 |
CN104271549A (en) * | 2012-05-03 | 2015-01-07 | 帝斯曼知识产权资产管理有限公司 | New intermediate compound for preparing vitamin b6 |
CN104271549B (en) * | 2012-05-03 | 2017-07-04 | 帝斯曼知识产权资产管理有限公司 | It is a kind of new to prepare vitamin B6Midbody compound |
CN102766048A (en) * | 2012-07-20 | 2012-11-07 | 广州市博兴化工科技有限公司 | (Methyl) acrylate compound containing ketone carbonyl group as well as preparation method and application thereof |
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